Load to failure of different zirconia implant abutments with titanium components

Publication date: Available online 9 November 2016
Source:The Journal of Prosthetic Dentistry
Author(s): Faye Mascarenhas, Burak Yilmaz, Edwin McGlumphy, Nancy Clelland, Jeremy Seidt
Statement of problemAbutments with a zirconia superstructure and a titanium insert have recently become popular. Although they have been tested under static load, their performance under simulated mastication is not well known.PurposeThe purpose of this in vitro study was to compare the cyclic load to failure of 3 types of zirconia abutments with different mechanisms of retention of the zirconia to the titanium interface.Material and methodsFifteen implants (n=5 per system) and abutments (3 groups: 5 friction fit [Frft]; 5 bonded; and 5 titanium ring friction fit [Ringfrft]) were used. Abutments were thermocycled in water between 5°C and 55°C for 15000 cycles and then cyclically loaded for 20000 cycles or until failure at a frequency of 2 Hz by using a sequentially increased loading protocol up to a maximum of 720 N. The load to failure for each group was recorded, and 1-way analysis of variance was performed.ResultsThe mean load-to-failure values for the Frft group was 526 N, 605 N for the bonded group 605, 288 N for the Ringfrft group. A statistically significant difference was found among all abutments tested (P<.05).ConclusionsAbutments with the bonded connection showed the highest load-to-failure value, and the abutment with the titanium ring friction fit connection showed the lowest load-to-failure value.



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